2PM
Is a South Korean boy band, consisting of Junsu, Junho, Nichkhun, Taecyeon, Wooyoung and Chansung.

Originally a seven-member group, but currently consisting of six members due to sudden withdrawal of leader Jaebeom following an Internet controversy in September 2009, in which he had mentioned on his MySpace page his dislike for South Korea (having grown up in the United States).

2PM is managed by JYP Entertainment, who brought us Rain and The Wonder Girls as well.

The group debuted with the song "10 Jeom Manjeome 10 Jeom" (10점 만점에 10점 ~ 10 Points Out of 10 Points), which showcased their acrobatic and b-boy dance styles. They achieved their first #1 song with "Again & Again".

Super Junior
(Korean: 슈퍼주니어), often referred to as SJ or SuJu (슈주), is a boy band from Seoul, South Korea formed by SM Entertainment in 2005.

With a total of thirteen members, Super Junior is the largest boy band in the world.

The group consists of Leeteuk (leader), Heechul, Han Geng, Yesung, Kang-in, Shindong, Sungmin, Eunhyuk, Donghae, Siwon, Ryeowook, Kibum, and Kyuhyun. The Chinese member, Han Geng, was chosen from three thousand applicants, via auditions held in China by SM Entertainment in 2001.